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材料工程  2018, Vol. 46 Issue (8): 91-97    DOI: 10.11868/j.issn.1001-4381.2016.001182
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
稀土CeO2对AlCoCuFeMnNi高熵合金组织与性能的影响
彭竹琴1, 李俊魁2, 卢金斌3, 马明星1, 吴玉萍4
1. 中原工学院 材料与化工学院, 郑州 450007;
2. 燕山大学 亚稳材料制备技术与科学国家重点实验室, 河北 秦皇岛 066004;
3. 苏州科技大学 机械工程学院, 江苏 苏州 215009;
4. 河海大学 力学与材料学院, 南京 210098
Effects of Rare Earth CeO2 on Microstructure and Properties of AlCoCuFeMnNi High-entropy Alloys
PENG Zhu-qin1, LI Jun-kui2, LU Jin-bin3, MA Ming-xing1, WU Yu-ping4
1. Department of Material and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China;
2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China;
3. School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China;
4. College of Mechanics and Materials, Hohai University, Nanjing 210098, China
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摘要 采用等离子熔覆技术,在45钢基体上制备添加稀土CeO2的AlCoCuFeMnNi高熵合金涂层。利用XRD,SEM和EDS研究涂层的显微组织和相组成,并测试其显微硬度和磨损性能。结果表明:合金涂层主要由BCC枝晶和FCC枝晶间组织构成。热力学计算表明,未添加稀土CeO2的涂层中有少量AlCoNi相,而且其枝晶内析出了大量富Fe颗粒,涂层硬度值在260~420HV0.2间呈梯度变化,摩擦因数在0.16~0.57之间。添加1%(质量分数)的稀土CeO2后,基体中Fe元素向涂层内部的扩散程度降低,涂层底部形成一条宽约32μm的富Fe胞晶过渡层,涂层硬度在400HV0.2左右,摩擦因数稳定在0.28~0.31之间,磨损量为添加前的74.4%,细晶强化是涂层磨损性能提高的主要原因。
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彭竹琴
李俊魁
卢金斌
马明星
吴玉萍
关键词 高熵合金CeO2显微组织磨损性能    
Abstract:The AlCoCuFeMnNi high-entropy alloy cladding layer with CeO2 was prepared by plasma cladding technology on 45 steel. The microstructure and phase composition of the cladding layer were investigated by XRD, SEM and EDS, and its microhardness and wear property were also tested. The results show that the phase structure of the cladding layer is mainly composed of BCC dendrites and FCC interdendrites. Thermodynamic calculation shows a small amount of AlCoNi phase exists in the cladding layer without CeO2, and a large number of Fe-rich precipitated particles in the dendrites is observed, the hardness value exhibits gradient changes from 260HV0.2 to 420HV0.2, and their friction coefficient is between 0.16 and 0.57. After adding 1%(mass fraction) CeO2, the Fe diffusion decreases into cladding layer, and a 32μm Fe-rich peritectic transition layer is formed on the bottom of the cladding layer. The average hardness value is about 400HV0.2, and their friction coefficient is relatively stable (0.28-0.31). The mass loss of the layer with CeO2 is 74.4% of that without CeO2. The grain refinement strengthening is the main reason of the improvement of wear properties.
Key wordshigh-entropy alloy    CeO2    microstructure    wear property
收稿日期: 2016-10-05      出版日期: 2018-08-17
中图分类号:  TG174.44  
通讯作者: 彭竹琴(1964-),女,教授,硕士,主要从事离子束表面改性方面的研究工作,联系地址:河南省新郑市双湖经济开发区淮河路1号中原工学院材料与化工学院(450007),E-mail:pengzqzz@126.com     E-mail: pengzqzz@126.com
引用本文:   
彭竹琴, 李俊魁, 卢金斌, 马明星, 吴玉萍. 稀土CeO2对AlCoCuFeMnNi高熵合金组织与性能的影响[J]. 材料工程, 2018, 46(8): 91-97.
PENG Zhu-qin, LI Jun-kui, LU Jin-bin, MA Ming-xing, WU Yu-ping. Effects of Rare Earth CeO2 on Microstructure and Properties of AlCoCuFeMnNi High-entropy Alloys. Journal of Materials Engineering, 2018, 46(8): 91-97.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001182      或      http://jme.biam.ac.cn/CN/Y2018/V46/I8/91
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